P-Toluenesulfonylhydrazide → 3-(2-(4-methoxybenzylamino)-6-bromoquinolin-3-yl)-N-(cyclohexylmethyl)propanamide

HRID 930220Notes

Reaction equation

HRID 930220 reaction equation
[CH3:1][O:2][C:3]1[CH:33]=[CH:32][C:6]([CH2:7][NH:8][C:9]2[C:18](/[CH:19]=[CH:20]/[C:21]([NH:23][CH2:24][CH:25]3[CH2:30][CH2:29][CH2:28][CH2:27][CH2:26]3)=[O:22])=[CH:17][C:16]3[C:11](=[CH:12][CH:13]=[C:14]([Br:31])[CH:15]=3)[N:10]=2)=[CH:5][CH:4]=1.CC1C=CC(S(NN)(=O)=O)=CC=1.C([O-])(=O)C.[Na+]>COCCOC.O>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]([CH2:7][NH:8][C:9]2[C:18]([CH2:19][CH2:20][C:21]([NH:23][CH2:24][CH:25]3[CH2:30][CH2:29][CH2:28][CH2:27][CH2:26]3)=[O:22])=[CH:17][C:16]3[C:11](=[CH:12][CH:13]=[C:14]([Br:31])[CH:15]=3)[N:10]=2)=[CH:32][CH:33]=1

Participants

6

Reactant 3

HCID 15303P-ToluenesulfonylhydrazideHCID 517045Sodium AcetateHCID 71138888(E)-3-(2-(4-methoxybenzylamino)-6-bromoquinolin-3-yl)-N-(cyclohexylmethyl)acrylamide2×

Product 1

HCID 711385863-(2-(4-methoxybenzylamino)-6-bromoquinolin-3-yl)-N-(cyclohexylmethyl)propanamide

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
86 °C

Procedure

To a stirred solution of (E)-3-(2-(4-methoxybenzylamino)-6-bromoquinolin-3-yl)-N-(cyclohexylmethyl)acrylamide (representative compound 10; 3.7 g, 7.3 mmol) in DME (100 mL) was added 4-methylbenzenesulfonohydrazide (13.6 g, 72.8 mmol). The mixture was brought to reflux at 86° C. and then via addition funnel was added dropwise a solution of sodium acetate (10.4 g, 127 mmol) in water (60 mL) over 1.5 h. Once the addition was complete, the reaction was refluxed for an additional 30 min, and then cooled to RT and concentrated to remove organic solvent. The crude material was dissolved in DCM (150 mL) and washed sequentially with 1N NaOH, 1N HCl, and then water. The organic layer was dried over MgSO4, filtered and concentrated to give a yellow oil. Purification via flash chromatography (5% EtOAc/dichloromethane) afforded 3-(2-(4-methoxybenzylamino)-6-bromoquinolin-3-yl)-N-(cyclohexylmethyl)propanamide (representative compound 11). Step 2 In a sealed tube was combined 3-(2-(4-methoxybenzylamino)-6-bromoquinolin-3-yl)-N-(cyclohexylmethyl)propanamide (0.16 g, 0.31 mmol), 2-chlorophenylboronic acid (0.074 g, 0.47 mmol), bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II) (0.0044 g, 0.0063 mmol), potassium acetate (0.062 g, 0.63 mmol), EtOH (6.0 ml) and water (0.41 mL). The flask was sealed and heated in an oil bath at 85° C. for 16 h. The reaction mixture was cooled to RT, adsorbed onto silica and purified by flash chromatography (5% MeOH/dichloromethane) to afford 3-(2-(4-methoxybenzylamino)-6-(2-chlorophenyl)quinolin-3-yl)-N-(cyclohexylmethyl)propanamide. Step: 3 Following the same procedure as in Step 9 of Scheme II, 3-(2-amino-6-(2-chlorophenyl)quinolin-3-yl)-N-(cyclohexylmethyl)propanamide (representative compound 6) was obtained after 3 hours of refluxing in TFA. MS (ESI, pos. ion) m/z: 422 (M+1).

Workup

  1. additionvia addition funnel
  2. additionOnce the addition
  3. temperaturethe reaction was refluxed for an additional 30 min
  4. temperaturecooled to RT
  5. concentrationconcentrated
  6. customto remove organic solvent
  7. dissolutionThe crude material was dissolved in DCM (150 mL)
  8. washwashed sequentially with 1N NaOH, 1N HCl
  9. dry with materialThe organic layer was dried over MgSO4
  10. filtrationfiltered
  11. concentrationconcentrated
  12. customto give a yellow oil
  13. customPurification via flash chromatography (5% EtOAc/dichloromethane)

Sources & evidence

ORD record
ord-8ad30777e13f453aa82e0de2872d1935
Source dataset
uspto-grants-2016_03
Patent number
US09296698B2

Reaction notes

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